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Finding the Fourth Proportional to 957.40, 1,436.30 and 308.18

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Solution

The fourth proportional to 957.40, 1,436.30 and 308.18 is: 462.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    957.40 : 1,436.30 = 308.18 : x
  2. Step 2: Convert to fraction form
    957.40/1,436.30 = 308.18/x
  3. Step 3: Cross multiply
    957.40x = 1,436.30 × 308.18
  4. Step 4: Simplify right side
    957.40x = 442,638.93
  5. Step 5: Solve for x
    x = 442,638.93/957.40
  6. Step 6: Final answer
    x = 462.33

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.